摘要:
The method and device are used for obtaining pure nitrogen and oxygen by low-temperature separation of air. A distillation column system comprises a high-pressure column (20), a low-pressure column (21) and an argon column (22) as well as a high-pressure column top condenser (23), a low-pressure column bottom condenser (24) and an argon top condenser (25). The entire amount of air supplied is compressed to a first pressure in a main air compressor (1). A first sub-stream (10, 6, 15, 16) of the air that has been compressed to the first pressure is cooled in a main heat exchanger (26) and is fed (18) at least in part to the distillation column system. A second sub-stream (7) of the air that has been compressed to the first pressure is cooled in the main heat exchanger (26) and is then at least partially liquefied in the low-pressure column bottom evaporator (24). The at least partially liquefied second sub-stream (31, 33, 19) is introduced at least in part into the distillation column system. A liquid oxygen-enriched fraction (62, 86) is introduced (63, 64, 65) into the evaporation chamber of the high-pressure top condenser (23). An argon-containing oxygen stream (70) from an intermediate point in the low-pressure column (21) is introduced into the argon column (22). The second sub-stream (31) downstream of the low-pressure column bottom evaporator (24) is introduced at least in part into the argon top condenser (25) and is partially evaporated therein. The second sub-stream (33) downstream of the argon top condenser (25) is introduced at least in part into the high-pressure column (20) and/or into the low-pressure column (21).
摘要:
Die Erfindung betrifft einen Umlaufkondensator mit einem Kondensatorblock, der Verflüssigungspassagen (4) für ein Heizmedium und mindestens einen Umlaufabschnitt (100, 200, 300, 400) mit Verdampfungspassagen (1, 11) für eine Flüssigkeit aufweist. Die Eintrittsöffnung (2, 12) und die Austrittsöffnung (3, 13) jeder Verdampfungspassage (1, 11) befinden sich auf gegenüberliegenden Seiten des Kondensatorblocks, wobei die Eintrittsöffnungen (2, 12) aller Verdampfungspassagen (1, 11) des Umlaufabschnittes (100, 200, 300, 400) unterhalb der Austrittsöffnungen (3, 13) angeordnet sind. Femer sind erste und zweite Verdampfungspassagen (1, 11) vorgesehen, wobei sich die Eintrittsöffnungen (2) der ersten Verdampfungspassagen (1) und die Austrittsöffnungen (13) der zweiten Verdampfungspassagen (11) auf der gleichen Seite des Kondensatorblocks befinden.
摘要:
Dephlegmator system without headers, collectors, or distributors at the bottom end of feed circuits in plate and fin exchangers operating in condensing or rectifying service. Each dephlegmator (1,37) is installed within a pressure vessel (3), thereby eliminating the need for headers, collectors, or distributors at the bottom end of the feed circuits. In an alternative embodiment of the invention, upper and lower segments of the pressure vessel (3) are isolated by a mid-vessel seal (207) between the vessel and dephlegmator walls, and headers or collectors are not required at the upper and lower ends of the feed circuits.
摘要:
Die Erfindung betrifft eine Vorrichtung zum Verdampfen einer Flüssigkeit mit einem Wärmeaustauscher, der Verdampfungspassagen (7, 10) für die Flüssigkeit und Verflüssigungspassagen für ein Heizmedium besitzt und mindestens zwei übereinander angeordnete Umlaufabschnitte (a, b) aufweist. Die Verdampfungspassagen (7, 10) besitzen jeweils am unteren Ende eines Umlaufabschnittes (a, b) eine Eintrittsöffnung für die Flüssigkeit und jeweils am oberen Ende eines Umlaufabschnittes eine Austrittsöffnung für die Flüssigkeit. Femer sind Mittel zum Führen von Flüssigkeit von der Austrittsöffnung eines Umlaufabschnittes zu der Eintrittsöffnung des darunterliegenden Umlaufabschnittes vorgesehen. Mindestens zwei parallel geschaltete Wärmeaustauscher (4) sind so angeordnet, daß sich in dem Zwischenraum (13) zwischen den Wärmeaustauschern (4) mindestens eine Aufnahmevorrichtung für Flüssigkeit befindet.
摘要:
Ce vaporiseur-condenseur (1) comprend deux parties d'échangeur superposées (2A, 2B). La partie inférieure (2A), immergée dans le liquide, a ses passages de vaporisation (8A) alimentés en source. La vapeur qui en sort est envoyée à l'entrée des passages de vaporisation (8B) de la partie supérieure, et du liquide est distribué dans le flux de vapeur qui pénètre dans chacun de ces passages. Application à la vaporisation d'oxygène liquide par condensation d'azote.
摘要:
A nitrogen-depleted crude argon product (175) is recovered by cryogenic separation of air in a primary distillation system comprising at least a first distillation column (129) and a side-arm column (139) in which separation a nitrogen-containing, argon-rich side stream (141) withdrawn from a location of the side-arm column (139) above the location of entry of the argon-containing feed stream (135) is fed to a nitrogen rejection column (145) having at least a stripping section (147) located below the location of the feed of the nitrogen-containing, argon-rich side stream (141). Nitrogen-depleted, crude argon product (175) is recovered and removed from the bottom of the nitrogen rejection column (145); and at least a portion of upward flowing vapour in the nitrogen rejection column is returned (143) to a suitable location of the side-arm column (139).
摘要:
The present invention concerns a method and device for producing compressed nitrogen by air classification at a low temperature in a rectifying apparatus presenting a pressure column (4) and a low pressure column (5). The air used (1, 3) is introduced in the pressure column (4). A liquid fraction containing oxygen is taken from the pressure column (4) and introduced in the low pressure column (5). The gas nitrogen (18) from the low pressure column (5) is condensed, at least partially, in a head capacitor through indirect heat transfer using an evaporating liquid (13). In order for the nitrogen from the pressure column to be obtained in the form of a compressed gas (24, 24, 29), a pressure is used which is higher than that needed for the operation of the low pressure column (5). The nitrogen (20) bleed from the low pressure column is exposed in that liquid state to a pressure higher than that of the low pressure column (5). The liquid (22) put under pressure is evaporated in an evaporator (23) through direct heat transfer involving a heat carrier (35), which produces a gaseous compressed nitrogen (24, 25, 29).
摘要:
An ascending vapour phase is initiated within the lower pressure column 20 of a double distillation column 1 by vaporising a descending liquid phase at a column location situated between mass transfer elements 22 and a sump region 30 of the lower pressure column 20. The liquid phase is vaporised within two or more down flow reboilers 26 and 28 fed with the liquid phase so that the unboiled liquid from one (26) of the down flow reboilers is fed to the other (28) of the down flow reboilers, thereby to cause vaporisation to be distributed between the down flow reboilers 26 and 28. The down flow reboilers 26 and 28 are operated such that sufficient vaporisation occurs to produce a predetermined liquid-vapour ratio at the column location between the transfer elements 22 and the sump 30 without the requirement of recirculating sump liquid to prevent dry out.
摘要:
La double colonne (1, 2) comporte un appareil de vaporisation d'oxygène et de condensation d'azote qui comprend d'une part un échangeur de chaleur principal (7) à ruissellement d'oxygène partiellement immergé lors des arrêts de l'installation, et d'autre part un échangeur de chaleur auxiliaire (20) qui assure seul la vaporisation de liquide lors du redémarrage de l'installation.